Array beamforming for long code CDMA under carrier drift

Author

Drumright, Thomas A. ; Tabarrok, Amir Ali ; Ding, Zhi

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA

Volume

4

fYear

2003

fDate

1-5 Dec. 2003

Firstpage

2156

Abstract

We present a blind array beamforming method for the detection of aperiodic CDMA signals in the presence of an unknown carrier drift. This method employs a differential array beamforming algorithm (DABA), which utilizes the known spreading code of the desired user to estimate the signal subspace under carrier drift. Successful beamforming enables better carrier drift estimation before detecting user data symbols. Simulations are performed in order to compare this method with an existing subspace technique, as well as two baseline (Weiner filter and single element matched filter) detectors.

Keywords

array signal processing; code division multiple access; parameter estimation; signal detection; spread spectrum communication; DS-CDMA; Wiener filter; aperiodic CDMA; blind beamforming; carrier drift estimation; differential array beamforming algorithm; long code CDMA; matched filter; signal detection; signal subspace estimation; spreading code; Array signal processing; Detectors; Frequency estimation; Linear antenna arrays; Matched filters; Multiaccess communication; Multiuser detection; Phase estimation; Receiving antennas; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE

Print_ISBN

0-7803-7974-8

Type

conf

DOI

10.1109/GLOCOM.2003.1258617

Filename

1258617